| GMD | Text |
| Classification | 569 ZOE |
| Publisher | Washington, D.C., National Geographic Society, 2015 |
| Subject | Animals, Fossil -- Juvenile literature.Mammals -- Juvenile literature.Mammals, Fossil -- Juvenile literature. |
| Series | National Geographic kids#Level 2.National Geographic kids readers.#Level 2. |
| Description | 32 p.: col. ill. ; 24 cm. |
| ISBN | 9781426319518 |